Simulating the formation of cosmic structure

Details Simulating the formation of cosmic structure Simulating the formation of cosmic structure

2002-08-11

arxiv.org/abs/astro-ph/0208219v1

Phil.Trans.Roy.Soc.Lond.300:1277,2002

Astronomy and Astrophysics

Astrophysics

19 pages, 8 figs. Invited paper at Royal Society Discussion Meeting on ``New Science from High Performance Computing.'' High r

Scientific paper

10.1098/rsta.2002.0995

A timely combination of new theoretical ideas and observational discoveries has brought about significant advances in our understanding of cosmic evolution. Computer simulations have played a key role in these developments by providing the means to interpret astronomical data in the context of physical and cosmological theory. In the current paradigm, our Universe has a flat geometry, is undergoing accelerated expansion and is gravitationaly dominated by elementary particles that make up cold dark matter. Within this framework, it is possible to simulate in a computer the emergence of galaxies and other structures from small quantum fluctuations imprinted during an epoch of inflationary expansion shortly after the Big Bang. The simulations must take into account the evolution of the dark matter as well as the gaseous processes involved in the formation of stars and other visible components. Although many unresolved questions remain, a coherent picture for the formation of cosmic structure in now beginning to emerge. In this paper, I review a selection of recent results obtained from simulations of the cosmic large-scale structure and galaxy formation and compare them with observational data, including results from the ``2dF Galaxy Redshift Survey.''

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